Lens-fitted photographic film package and flash unit
US5432572A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 6, 1993 |
| Grant date | Jul 11, 1995 |
| Priority date | — |
| Expiry date | Dec 6, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2219/045
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A panoramic lens-fitted photographic film package with a flash unit. A charge switch of the flash unit is actuated by depressing or sliding a charge switch plate which is formed in one of a pair of grips disposed on the front wall of the film package. A synchro-flash switch of the flash unit includes first and second contact segments extending parallel to each other toward a between-lens-shutter mechanism. The first contact segment is depressed by an arm portion formed integrally on a connecting lever of the shutter mechanism when the connecting lever is struck by an actuating lever to move a shutter blade to open an exposure opening, upon a shutter release operation being effected. The depressed first contact segment is brought into contact with the second contact segment, thereby outputting a synchro-flash signal. A light projector of the flash unit has a discharge tube, a reflector and a diffusion plate. The reflector is formed by shearing and folding a sheet material, and has splayed side reflection surfaces adapted to increase the horizontal illuminating angle. The diffusion plate is adapted to limit the vertical illuminating angle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.